<template>
  <div id="cesiumContainer"></div>
</template>

<script>
export default {
  name: 'SphereOutlineGeometry',
  mounted() {
    let viewer = this.initCesium()

    this.addSphereOutlineGeometry(viewer)
  },
  methods: {
    initCesium: function () {
      Cesium.Ion.defaultAccessToken =
        'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiJkZjg4ZjljZC1mZGM3LTRlZjEtYjg3MC00MjZkNGU3YjI5ZWUiLCJpZCI6MTU5NTIsImlhdCI6MTYwNTE0ODM5OX0.LjxeKrgAo7Ksk8405kSAhYwF0nKcF2w2DGJnKHh51N8'
      let viewer = new Cesium.Viewer('cesiumContainer', {
        animation: false,
        baseLayerPicker: false,
        fullscreenButton: false,
        geocoder: false,
        homeButton: false,
        infoBox: true,
        sceneModePicker: false,
        navigationHelpButton: false,
        scene3DOnly: true,
        timeline: false,
        selectionIndicator: false, //是否显示选取指示器组件
        shouldAnimate: false, //自动播放动画控件
        shadows: true, //是否显示光照投射的阴影
        terrainShadows: Cesium.ShadowMode.RECEIVE_ONLY, //地质接收阴影
        sceneMode: Cesium.SceneMode.SCENE3D,
        clock: new Cesium.Clock(),
        terrainProvider: new Cesium.EllipsoidTerrainProvider()
      })
      viewer._cesiumWidget._creditContainer.style.display = 'none' //	去除版权信息
      return viewer
    },
    addSphereOutlineGeometry(viewer) {
      let sphere = new Cesium.SphereOutlineGeometry({
        radius: 100000.0,
        stackPartitions: 6,
        slicePartitions: 5,
        vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT
      })
      let geometry = Cesium.SphereOutlineGeometry.createGeometry(sphere)

      let polygonInstance1 = new Cesium.GeometryInstance({
        geometry: geometry,
        modelMatrix: Cesium.Matrix4.multiplyByTranslation(
          Cesium.Transforms.eastNorthUpToFixedFrame(Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883)),
          new Cesium.Cartesian3(0.0, 0.0, 10000.0),
          new Cesium.Matrix4()
        ),
        attributes: {
          color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.AQUA)
        },
        id: 'polygonInstance1'
      })

      let primitive = new Cesium.Primitive({
        geometryInstances: [polygonInstance1],
        asynchronous: false, //是否采用多线程
        appearance: new Cesium.PerInstanceColorAppearance({
          translucent: false, //半透明
          flat: true //当 true 时，片段着色器中将使用平面阴影，这意味着不考虑光照
        })
      })

      viewer.scene.primitives.add(primitive)
    }
  }
}
</script>
